Basic English is the language that uses a limited amount of words and grammar to communicate with people. It's also sometimes called "1000 English words" or "Simple English".
Basic English is designed to help people understand each other more quickly and easily. Think of it like a shortcut! Instead of having to use big, complicated words, you can say the same thing with a few simple words. For example, instead of saying "I am feeling very sad and overwhelmed today" you could say "I'm feeling tired and down". This makes it easier for people to understand each other.